The Copyright Notice

As of March 1, 1989 a work is copyrighted the instant it becomes
tangible. It is no longer necessary to register
with the copyright office. However, it is still a good idea to
file a work with the Library of Congress Copyright Office in order
to give the copyright owner a stronger case in court and more money
if someone infringes on the work. A copyright notice is also still a good idea
because it discourages infringement, it forestalls a claimant's
argument the he didn't know it was copyrighted, and it makes it
easier to track down the owner to get permission to use it.

"no part of this book may be reproduced in any format or by any
means in part or in full without express permission of the
copyright owner", etc, etc, etc. go ahead but, the only thing it
might do is act as a deterrent to infringers; it really has no
legal merit. What does have legal merit is that the notice should
be noticeable; not hidden away in the fine print. The location of
the copyright notice is legally defined as "in such manner and
location as to give reasonable notice of the claim of
copyright".

For more information on the Copyright Notice see Circular 3 from the Library of Congress
Copyright Office.